Elon Musk’s artificial intelligence firm, xAI, has introduced Grok 4.1, the latest and most advanced iteration of the Grok model. Announced by Musk via his platform X, the update promises substantial advancements in speed, accuracy, and user experience, representing a crucial advancement in xAI’s competition with established AI leaders. Musk communicated the release directly to users, stating, “Grok 4.1 just released. You should notice a significant increase in speed and quality.” This announcement sparked considerable excitement as xAI outlined the model’s features and the extensive efforts put into minimizing errors and enhancing reliability. According to xAI, Grok 4.1 not only improves performance but also enhances the model’s emotional and creative engagement.
The company asserts that the new version excels in collaborative interactions while maintaining the intelligence and stability of previous versions. Internal assessments reportedly indicate that Grok 4.1 is “exceptionally capable in creative, emotional, and collaborative interactions,” showcasing xAI’s ambition for a model that appears more human while remaining technically proficient. One of the major challenges confronting AI firms today is factual hallucination—when a model confidently presents inaccurate information as truth. xAI claims to have addressed this problem directly. The company concentrated its post-training efforts on reducing hallucinations specifically in real-world, information-seeking scenarios. Their testing utilized production-level traffic and the widely adopted FActScore benchmark, which evaluates accuracy across 500 biographical inquiries. The findings demonstrate clear progress.
While the previous Grok 4 Fast model had a hallucination rate of 12 percent, Grok 4.1 has reduced this figure to just 4 percent, rendering it nearly three times more reliable. The FActScore benchmark corroborated this improvement, with Grok 4.1 achieving a score of 2.97 percent, a notable decline from the earlier model’s 9.89 percent. In addition to accuracy, Grok 4.1 has also made an impact in competitive rankings. On LMArena, a respected site for assessing large language models, Grok 4.1 in quasarflux mode attained the top rank with an Elo score of 1483—31 points ahead of the nearest non-xAI rival. Even the non-reasoning tensor mode outperformed numerous full-reasoning models from other companies, achieving the second-highest overall rank.
Prior to its official launch, xAI executed a two-week silent deployment from November 1 to 14, gradually rolling out the updated model to users. During this period, continuous blind evaluations were conducted to gauge user preference. In head-to-head comparisons with the previous model, Grok 4.1 recorded a win rate of 64.78 percent, reflecting a strong favorable reception from users. Grok 4.1 is now widely accessible. Users can find it on grok.com, the X platform, and through both iOS and Android applications. It can be selected directly through the model picker or utilized in Auto mode for an optimized experience.
With its renewed emphasis on accuracy, responsiveness, and real-world dependability, Grok 4.1 positions xAI as a significant contender in the rapidly advancing AI landscape.